A running shoe is designed to cradle the foot, and not just protect
it from the pounding, but to optimize a runner's gait in such a way that
a person can run longer and faster without worrying about injury. At
its most basic, a running shoe is made up of an outsole, midsole and
upper. The outsole is the bottom of the shoe, that durable slab of
rubber providing traction throughout the gait cycle. The midsole rests
atop the outsole, and provides cushioning and stability. The upper is
generally made of mesh, synthetic fabrics or leather, and cocoons the
foot.Just as every run is unique, so every running shoe is designed for a
specific type of runner. When selecting a running shoe, take into
account the frequency of your training and your performance level. A
shoe should fit comfortably and snug, but should not be so tight that
your toes press against the front of the shoe or the top of your foot
aches from the laces being too tight.
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